Yuuki
- Appearance: Yuuki is completely identical to his twin brother Yuuri. Yuuki has fair skin, light blue eyes, and keeps his long hair tied back into a braid. The only difference between his brother and him is that Yuuki has completely white hair. Although it is later revealed that their hair color is actually the same!
- Fashion: As far as fashion goes Yuuki stands out among the Princess' guardians. Yuuki tends to wear entirely white clothing, from shirt to shoes. Yuuki can almost always be seen wearing his white doctor's coat as well. Everything he wears seems to match his hair. On vacations that the royal family has taken to the beach before Yuuki wore a very beach-themed shirt and pair of shorts, much to everyone's surprise! Like the others he also has a few sets of very nice formal wear.
- Abilities: Yuuki has the same strong magical abilities as his brother, perhaps stronger. However due to his caring nature or his profession as a doctor, he rarely uses his strong abilities for offensive attacks and instead uses his powers to defend and heal. His strong healing abilities also help him with his profession
- Home & Family: Though not much is known about Yuuki and Yuuri's family, if anyone were to ask, Yuuki would probably be much more willing to answer than his brother. Yuuki and his brother were taken to begin their training sometime around the age of six. Yuuki as a child was incredibly gifted in learning and so was normally considered the brighter child, leading to some hints of jealousy and acting out in Yuuri. Their mother however tried to encourage the both of them to do their best. Yuuki and Yuuri's home country is highly populated with twins and the tradition/law is that the elder twin is given control over the younger one. But due to Yuuki's kind nature he rarely uses this right, unless it is an extreme instance or one in which Yuuki believes that Yuuri should do something he considers to be right. In such circumstances Yuuri seems to reluctantly agree and follow his home country's law.
- Castle Life: Yuuki's job at the palace is that of castle doctor. He is extremely skilled in this job and is considered to be one of the top doctor's in the kingdom, if not the world. Yuuki's ability to use healing magic also comes in handy for this. Yuuki treats everyone at the castle and is personal physician to the royal family. He is almost always in his office where he has a working space as well as a small lab in the back of the room. Yuuki has a nice, large room which he keeps very nice and organized but if he isn't there or in his office,he is probably hanging out with Yaori.
- Bio: Yuuki's personality is extremely cheerful and even a bit childish, because of this he is normally considered to be the younger twin, although it is later revealed that he is the older one by 3.57 minutes. But he enjoys being considered the younger one (as well as enjoying people's surprise when they find out otherwise!) He uses this much to his advantage; even going so far as to always refer to Yuuri as "Onii-chan" (older brother) which only confuses people more once they find out the truth. His personality, to many, conflicts with his great medical abilities and many who have met him at first do not actually trust his expertise because of his childish attitude, until they witness it first hand. Yuuki takes care of all of the Princess' medical concerns and is easy to freak out when he hears that she is experiencing any pain or other medical related problems. It is also his job to report any of his medical findings concerning her directly to the King and Queen. Yuuki seems to get along very well with everyone, and especially with Yaori and the two can often be seen talking happily with one another about various subjects; the two often have similar views on things as well as a great understanding of each other.